We investigate whether the eccentricities of warm Jupiters may arise from perturbations due to external giant planet companions.
While it may seem like a tall order to end all human life on the planet from an external threat, the Universe is more than up to the challenge.
In the case of L91, some astronomers say that external disrupter could be a ninth giant planet, as yet undiscovered.
On arrival, the people find that on the planet there is a single external resource, uncultivated land, all units of which are of homogeneous quality.
Johannes Kepler's (1571 1630) cosmology eliminated the celestial spheres, but he held that the planets were moved both by an external motive power, which he located in the Sun, and a motive soul associated with each planet.
In his Planetary Hypotheses, Ptolemy (c.90 168) rejected the Aristotelian concept of an external prime mover, maintaining instead that the planets have souls and move themselves with a voluntary motion.
While a sugarcane farm isn't a trap or another planet, it augments the internal and external conflict of the characters.
We also propose a region external to the ecosphere that could have habitable planets and we name this region the cryo-ecosphere.
Previously, users were forced to reference external vacation guides like Frommer's, TripAdvisor or Lonely Planet to research destinations before signing on to the site to book a vacation rental.
The slightly eccentric orbit of Planet J may indicate the presence of another external giant planet, which is hereafter termed Planet S (Thébault and Beust, 2001).
